I found a glitch but it could be related to the SYS instead of Juicy's ROM. If you are viewing a threaded SMS message and the sender sends multiple messages, it doesn't mark them read when you close the thread. Only marks one of them read everytime you open that thread and you cannot use "Mark All As Read". So if you go back into TF3D it'll show unread messages.
As for the PP debate, yes it could be a placebo effect but I have noticed a noticeable improvement from 4.4.1 to 4.5. I used the stock PP in 4.4.1 and I noticed a lag especially when accessing the Settings menu.
I'll try the stock PP with 4.6